Improvement in sawing-machines



NITED STATES i ATENT OFFICE.

P. B. PERKINS, OF ALMOND, NEW YORK.

IMPROVEMENT IN SAWING-MACHINES.

Specilieation forming part of Letters Patent No. 43,7011,

invention. Fig. EZ is a plan or top view of the same.

Similar letters of reference indicate like parts.

rIhis invention consists in a reciprccatin g saw hinged directly to the driving power and guided by rollers secured in astandard which rises from a tilting adjustable platform in such a manner that by the action of a doublecrank hand-lever on the platform the saw can be raised or lowered without stopping the en gine, and the power with which the saw bears upon the log can be regulated at pleasure, and by dropping the hand-lever into notches in the inner end of the titing platform, the outer end of the same, together with the saw, are held in an elevated position, `thus giving a chance to the operator to shift his log or per form any work of a similar nature without stopping the engine or paying any attention to the saw.

G is the saw, the shank of which ishin ged to the cross-head D, so that it can swing easily up and down in a vertital plane, but is compelled to move with said cross-head in a longitudinal direction. The shank of the saw is guided by rollers the axles of which have their bearin gs in a standard, g, which rises from a platform, H. This platform oscillates on a pin h, which passes through the frame B, and through the platform at about the middle of its length, and it is so balanced that its outer end with the standard g has a tendency to de scend.

with notches or nicks 7c, lever, I, is platform and to the nicks that by throwing the saine in the direction of the arrow marked near it in Fig. l the rear endpof the platform is depressed and the saw is raised, and if the crank part of the lever catches in one of the nicks the saw is held in a'nelevated position.

ing a weight to dated August 2, 1964.

The inner end of the platform is provided and a double-crank arranged in such relation to said In order to adjust a log under the saw the lever is turned back, so that it enters one of the nicks (the first it' this will raise the saw high enough, or the second if the log is very thick and the saw is not raised high enough by the irst,') and the operator is at liberty to move the log without paying any further attention to the saw or stopping the engine.

When the log isadjusted, the saw is lowered and the operation of sawing commences. 1f the saw should bear down too hard upon the log, the hand-lever is slightly pressed back, and if the saw should not press down hard enough the pressure can be increased by han gthe front end of the platform.

With this machine the operation of sawing can be performed in the easiest possible manner. The saw can be operated Without interfering with the motion of the engine, and all parts are so arranged that they will operate without much (if any) attention.

Havingthus described my invention,- I claim as new andesire to secure by Letters Patent- The tilting platform H, with nicks h, in combination with the double-crank hand-lever I and saw Gr, all constructed and operating in the manner and for the purpose substantially as herein shown and described.

P. B. PE BKINS.

Witnesses:

WESLEY BROWN, WM. T. HOWELL, WALTER SLINGERLAND, WASHINGTON SLINGEELAND, I. L. COREY. 

